Dynamic Technology Lab’s Castle Biosciences CSTL Stock Holding History

Dynamic Technology Lab’s Portfolio CSTL Stock Details CSTL Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$391K	Buy	+15,913	New	+$521K	0.06%	529
2025 Q4	–	Sell	-29,310	Closed	-$667K	–	819
2025 Q3	$667K	Buy	+29,310	New	+$595K	0.11%	307
2025 Q2	–	Sell	-21,235	Closed	-$425K	–	1007
2025 Q1	$425K	Buy	21,235 +3,605	+20%	+$89.3K	0.06%	553
2024 Q4	$470K	Sell	17,630 -26,264	-60%	-$800K	0.08%	464
2024 Q3	$1.25M	Buy	+43,894	New	+$1.12M	0.13%	249
2022 Q1	–	Sell	-8,710	Closed	-$373K	–	1174
2021 Q4	$373K	Buy	+8,710	New	+$455K	0.04%	719
2021 Q3	–	Sell	-3,140	Closed	-$230K	–	1147
2021 Q2	$230K	Buy	+3,140	New	+$207K	0.02%	893
2020 Q4	–	Sell	-4,571	Closed	-$235K	–	1051
2020 Q3	$235K	Buy	+4,571	New	+$203K	0.04%	751
2020 Q2	–	Sell	-11,312	Closed	-$337K	–	1025
2020 Q1	$337K	Buy	+11,312	New	+$341K	0.07%	538

Other funds holding CSTL

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return

PCM

Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

SPPAM

Summit Partners Public Asset Management Boston, Massachusetts $3.72B AUM 162.29% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Allianz Asset Management Munich, Germany $95.4B AUM 38.74% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Dynamic Technology Lab's CSTL Position: Q1 2026 in Review

Dynamic Technology Lab opened a new position in Castle Biosciences (CSTL) in Q1 2026: 15,913 shares worth $391K. The stake represents 0.06% of the portfolio and ranks #529 among its holdings. This is a return to the name: Dynamic Technology Lab previously reported a position in CSTL as recently as Q3 2025.

Dynamic Technology Lab first reported a position in CSTL in Q1 2020 and has held it in 9 quarters since. The position peaked at $1.25M in Q3 2024. 186 funds tracked by Wall St. Rank hold CSTL as of Q1 2026.

Dynamic Technology Lab held 15,913 shares of Castle Biosciences worth $391K as of Q1 2026.
Castle Biosciences was a new Dynamic Technology Lab position in Q1 2026.
Castle Biosciences made up 0.06% of Dynamic Technology Lab's portfolio in Q1 2026, its #529 holding.
Dynamic Technology Lab first reported a position in Castle Biosciences in Q1 2020 and has held it in 9 quarters since.
Dynamic Technology Lab's Castle Biosciences position peaked at $1.25M in Q3 2024.
186 funds tracked by Wall St. Rank held Castle Biosciences as of Q1 2026.

Based on Dynamic Technology Lab's 13F filing for Q1 2026, filed 15 May 2026.